The purpose of this study was to examined the relationship of juvenile delinquents' multifactorial self concept and probability of re-offense. The sample of research was consisted of juvenile offenders in juvenile protection facilities and juvenile prison which are located in Seoul, Busan, Gwangju, Cheon. The result from the regressions to the future probability of re-offense with multifactorial self concepts shows that moral-ethical self concept was negaively related with the probability of re-offense in the four type of delinquent behaviors except rape, personality-related self concept was negatively related with the robbery, violent behavior and rape, social self concept was negatively related with the theft but positively related with violent behavior, ability-related self concept was positively related with rape, and family self concept was negatively related with probability of all the type of delinquent behaviors. The result from the regressions with the interaction terms shows that the four interaction terms significantly were related with the probability of re-offense.